<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <input v-focus />
  </div>


  <div id="root">
    <input v-focus />
  </div>

</body>
<script src="../../lib/vue.global.js"></script>
<script>
  //todo 创建全局自定义指令
  Vue.createApp({
    //通过direcitves选项来创建自定义指令
    directives: {
      // 指令名：指令选项
      focus: {
        mounted (el,binding) {
          el.focus()
        }
      }
    }
  }).mount('#app')
    



  Vue.createApp({}).mount('#root')
</script>
</html>